# Ordinary Differential Equations/First Order Linear 3

1) ${\displaystyle y'+3y=sin(x)\,\!}$
2) ${\displaystyle y'+{\frac {1}{x+3}}y=7x^{2}+4x}$
3) ${\displaystyle (x^{4}e^{x}-2mxy^{2})dx+2mx^{2}ydy}$